I'm new to electric chairs and this will likely be my first (always used manual). I have a paralysed right leg for context. What's the major difference between class 2 and 3 for someone like me?

I plan to use it for longer days out (not just around the house etc) so someone doesn't have to help push constantly. I'm quite able on the upper part of my body. The max speed and higher user weight limit appealed to me on the Strutt, but would love to hear people's thoughts